9.8.3. Restoring the Cluster
Note
The restore process restores an entire cluster to a previous state.
This is not intended to restore a single node. Because all data are replicate between all nodes, it is simpler and safer to remove a failed node and install a new one than it is to attempt to restore the node.
Important
Every step must be performed on every node in the cluster.
- Shut down every node in the storage cluster. Run the stop command on every storage machine:
[root@server ~]# serverRoot/jon-server-3.2.GA/bin/rhqctl.sh stop --storage - Remove the
commit_log/directory for each node.[root@server ~]# rm * /opt/jon/rhq-data/data/commit_log/* - Delete all files in the
metrics_indexdirectory, except for the snapshot files.[root@server ~]# rm /opt/jon/rhq-data/data/data/rhq/metrics_index/*.* - Copy all files from the desired snapshot directory into the
metrics_indexdirectory.[root@server ~]# cp /opt/jon/rhq-data/data/data/rhq/metrics_index/snapshots/timestamp/* /opt/jon/rhq-data/data/data/rhq/metrics_index - Restart each storage node.
[root@server ~]# serverRoot/jon-server-3.2.GA/bin/rhqctl start --storage
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